I got my Focus back yesterday and it's like I have a brand new car. The steering is COMPLETELY different. I noticed the difference as soon as I pulled out of the parking lot. The dealer replaced the gear, as well as reprograming the transmission. I can now drive down the highway with one hand and I don't have to wrestle the steering wheel with both hands. I think my car was worse off before than I was willing to admit. You never want to admit these things with a brand new car, but something was certainly wrong.
I'm very happy with the service department at Groove Ford in Centennial, CO. They listened to me and were open minded, and the manager of the service department personally drove my car to verify the problem.
The moral of the story? If you have a 2012 Focus and are fighting the steering at all, take it into the dealer, because something is wrong.